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/*
* OpenSSL BN Wrapper
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/internal/bn_wrap.h>
namespace Botan {
/*
* OSSL_BN Constructor
*/
OSSL_BN::OSSL_BN(const BigInt& in)
{
value = BN_new();
SecureVector<byte> encoding = BigInt::encode(in);
if(in != 0)
BN_bin2bn(encoding, encoding.size(), value);
}
/*
* OSSL_BN Constructor
*/
OSSL_BN::OSSL_BN(const byte in[], size_t length)
{
value = BN_new();
BN_bin2bn(in, length, value);
}
/*
* OSSL_BN Copy Constructor
*/
OSSL_BN::OSSL_BN(const OSSL_BN& other)
{
value = BN_dup(other.value);
}
/*
* OSSL_BN Destructor
*/
OSSL_BN::~OSSL_BN()
{
BN_clear_free(value);
}
/*
* OSSL_BN Assignment Operator
*/
OSSL_BN& OSSL_BN::operator=(const OSSL_BN& other)
{
BN_copy(value, other.value);
return (*this);
}
/*
* Export the BIGNUM as a bytestring
*/
void OSSL_BN::encode(byte out[], size_t length) const
{
BN_bn2bin(value, out + (length - bytes()));
}
/*
* Return the number of significant bytes
*/
size_t OSSL_BN::bytes() const
{
return BN_num_bytes(value);
}
/*
* OpenSSL to BigInt Conversions
*/
BigInt OSSL_BN::to_bigint() const
{
SecureVector<byte> out(bytes());
BN_bn2bin(value, out);
return BigInt::decode(out);
}
/*
* OSSL_BN_CTX Constructor
*/
OSSL_BN_CTX::OSSL_BN_CTX()
{
value = BN_CTX_new();
}
/*
* OSSL_BN_CTX Copy Constructor
*/
OSSL_BN_CTX::OSSL_BN_CTX(const OSSL_BN_CTX&)
{
value = BN_CTX_new();
}
/*
* OSSL_BN_CTX Destructor
*/
OSSL_BN_CTX::~OSSL_BN_CTX()
{
BN_CTX_free(value);
}
/*
* OSSL_BN_CTX Assignment Operator
*/
OSSL_BN_CTX& OSSL_BN_CTX::operator=(const OSSL_BN_CTX&)
{
value = BN_CTX_new();
return (*this);
}
}
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